| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] be used [prep] [adj] | 594 |
|
| 2 | be used [prep] [adj] purpose | 130 |
|
| 3 | [noun] be [prep] [adj] purpose | 19 |
|
| 4 | [noun] used [prep] [adj] purpose | 16 |
|
